:root{--teal:#0e6e66;--deep:#08302c;--deep2:#0b3f3a;--amber:#f0a93a;--amber2:#c77900;--ink:#1c2622;--mute:#5d6b66;--line:#e2e6e3;--bg:#f4f2ec;--card:#fff;--ok:#1e8a4a;--okbg:#e4f5ea;--bad:#b13a48;--badbg:#fbe8ea;--blue:#2a5ea7;
--r-bg:#ffffff;--r-ink:#1f2a26;--r-mute:#5d6b66;--r-line:#e5e9e6;--r-soft:#f4f7f5;--fs:18px;--lh:1.75}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans Sinhala","Iskoola Pota",sans-serif;font-size:16px;line-height:1.5}
body{padding-bottom:env(safe-area-inset-bottom)}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
.hidden{display:none!important}
.wrap{max-width:760px;margin:0 auto;padding:0 16px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:14px;padding:12px 18px;font-weight:700;background:var(--teal);color:#fff}
.btn.gold{background:var(--amber);color:#2b1a00}
.btn.ghost{background:#fff;color:var(--teal);border:1.5px solid var(--line)}
.btn.block{width:100%}
.btn:disabled{opacity:.5}
.serif{font-family:"Abhaya Libre",Georgia,"Noto Serif","Noto Serif Sinhala",serif}
/* top bar */
.top{position:sticky;top:0;z-index:20;background:var(--deep);color:#fff;padding:calc(10px + env(safe-area-inset-top)) 0 10px}
.top .wrap{display:flex;align-items:center;gap:10px}
.top img{width:34px;height:34px;border-radius:9px}
.top .t{font-weight:800;letter-spacing:.2px}
.top .t span{color:var(--amber)}
.top .sp{flex:1}
.iconbtn{width:40px;height:40px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;font-size:19px}
.top .iconbtn{color:#fff;background:rgba(255,255,255,.08)}
/* hero */
.hero{background:radial-gradient(120% 90% at 85% 0%,#14594f 0%,var(--deep) 55%,#05201d 100%);color:#fff;padding:18px 0 22px;position:relative;overflow:hidden}
.hero h1{margin:4px 0 2px;font-size:1.55rem}
.hero p{margin:0;opacity:.85}
.hero .net{position:absolute;right:-30px;top:-20px;width:220px;opacity:.25}
.lic{display:flex;align-items:center;gap:8px;margin-top:14px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);border-radius:12px;padding:8px 12px;font-size:.88rem}
.lic b{color:var(--amber)}
.lic button{margin-left:auto;color:#fff;border:1px solid rgba(255,255,255,.35);border-radius:9px;padding:4px 10px;font-size:.8rem}
.sec{margin:22px 0 10px;font-size:1.05rem;font-weight:800;color:var(--deep);display:flex;align-items:center;gap:8px}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:16px;box-shadow:0 1px 0 rgba(0,0,0,.02)}
/* continue */
.cont{display:flex;gap:14px;align-items:center;margin-top:-6px;position:relative;z-index:2}
.cont img{width:58px;height:82px;border-radius:8px;object-fit:cover;box-shadow:0 4px 12px rgba(0,0,0,.2)}
.cont .k{font-size:.78rem;color:var(--amber2);font-weight:800;text-transform:uppercase;letter-spacing:.06em}
.cont .n{font-weight:800;line-height:1.3;margin:2px 0 6px}
/* shelf */
.shelf{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px}
.book{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;text-align:left;display:flex;flex-direction:column}
.book .cv{aspect-ratio:595/842;background:#0b3f3a center/cover no-repeat;position:relative}
.book .lock{position:absolute;inset:0;background:rgba(5,25,22,.6);display:flex;align-items:center;justify-content:center;color:#fff;font-size:2rem}
.book .bd{padding:10px 12px 12px}
.book .bt{font-weight:800;font-size:.92rem;line-height:1.3}
.book .bs{font-size:.78rem;color:var(--mute);margin-top:2px}
.bar{height:6px;background:#e7ece9;border-radius:9px;overflow:hidden;margin-top:8px}
.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--teal),#2bb3a3);border-radius:9px;width:0}
.pill{display:inline-block;border-radius:999px;padding:2px 9px;font-size:.74rem;font-weight:800}
.pill.ok{background:var(--okbg);color:var(--ok)}.pill.am{background:#fff3dd;color:#8a5500}.pill.bad{background:var(--badbg);color:var(--bad)}.pill.mu{background:#eef1ef;color:var(--mute)}
/* book page */
.bhead{display:flex;gap:16px;align-items:flex-end}
.bhead img{width:110px;border-radius:10px;box-shadow:0 10px 26px rgba(0,0,0,.35)}
.bhead h1{font-size:1.35rem;line-height:1.25;margin:0}
.chl{display:flex;flex-direction:column;gap:10px}
.ch{display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:12px 14px;text-align:left;width:100%}
.ch .no{width:38px;height:38px;border-radius:12px;background:#e6f2ef;color:var(--teal);font-weight:900;display:flex;align-items:center;justify-content:center;flex:none}
.ch.done .no{background:var(--teal);color:#fff}
.ch .tt{flex:1;min-width:0}
.ch .tt b{display:block;font-size:.95rem;line-height:1.3}
.ch .tt small{color:var(--mute);font-size:.8rem}
.ch .go{color:var(--mute);font-size:1.2rem}
.exam{background:linear-gradient(135deg,#0b3f3a,#08302c);color:#fff;border-radius:18px;padding:16px;display:flex;gap:14px;align-items:center}
.exam .ic{font-size:2rem}
.exam b{display:block;font-size:1.05rem}
.exam small{opacity:.85}
/* reader */
.reader{background:var(--r-bg);color:var(--r-ink);min-height:100vh}
.rtop{position:sticky;top:0;z-index:30;background:var(--r-bg);border-bottom:1px solid var(--r-line);padding:calc(6px + env(safe-area-inset-top)) 0 0}
.rtop .wrap{display:flex;align-items:center;gap:4px}
.rtop .ttl{flex:1;min-width:0;font-weight:700;font-size:.9rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--r-mute)}
.rtop .iconbtn{color:var(--r-ink)}
.rtop .iconbtn.on{background:var(--teal);color:#fff}
.rprog{height:3px;background:transparent;margin-top:6px}
.rprog i{display:block;height:100%;width:0;background:var(--amber)}
.rbody{padding:20px 0 40px;font-size:var(--fs);line-height:var(--lh)}
.rbody .wrap{max-width:680px;padding:0 20px}
.rbody h1{font-family:"Abhaya Libre",Georgia,serif;font-size:1.6em;line-height:1.25;margin:.2em 0 .6em;color:var(--r-ink)}
.rbody .chno{display:inline-block;background:var(--amber);color:#2b1a00;font-weight:900;font-size:.62em;letter-spacing:.12em;border-radius:999px;padding:4px 12px;margin-bottom:6px}
.rbody h2{font-family:"Abhaya Libre",Georgia,serif;font-size:1.22em;line-height:1.3;margin:1.6em 0 .5em;color:var(--teal);padding-top:.2em;border-top:2px solid var(--r-line)}
.rbody p{margin:0 0 1em}
.rbody code{font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;font-size:.84em;background:var(--r-soft);border:1px solid var(--r-line);border-radius:6px;padding:1px 5px;white-space:nowrap}
.rbody .reading{background:rgba(240,169,58,.22);border-radius:8px;box-shadow:0 0 0 6px rgba(240,169,58,.22)}
.box{border-radius:14px;padding:14px 16px;margin:1.2em 0;border-left:5px solid var(--c);background:color-mix(in srgb,var(--c) 9%,var(--r-bg))}
.box .bt{font-size:.72em;font-weight:900;letter-spacing:.08em;color:var(--c);margin-bottom:6px;text-transform:uppercase}
.box p{margin:.4em 0}
.box p b.sp{color:var(--c)}
.tbl{overflow-x:auto;margin:1.1em -4px;padding:0 4px;-webkit-overflow-scrolling:touch}
.tbl table{border-collapse:separate;border-spacing:0;font-size:.82em;line-height:1.5;min-width:100%;border:1px solid var(--r-line);border-radius:12px;overflow:hidden}
.tbl th{background:color-mix(in srgb,var(--teal) 14%,var(--r-bg));color:var(--r-ink);text-align:left;padding:9px 10px;font-weight:800}
.tbl td{padding:9px 10px;border-top:1px solid var(--r-line);vertical-align:top;min-width:90px}
.tbl tr:nth-child(even) td{background:var(--r-soft)}
.swipe{font-size:.7em;color:var(--r-mute);margin:-.6em 0 1em}
pre.code{position:relative;background:#0f1d1a;color:#e6efe9;border-radius:14px;padding:14px 14px 14px;margin:1.1em 0;overflow-x:auto;font:13.5px/1.6 ui-monospace,"SF Mono",Menlo,Consolas,monospace;-webkit-overflow-scrolling:touch}
pre.code .cp{position:sticky;float:right;right:0;top:0;background:rgba(255,255,255,.12);color:#fff;border-radius:8px;padding:3px 9px;font:600 12px system-ui}
pre.code .k{color:#ffcb6b}pre.code .s{color:#a8e6a1}pre.code .c{color:#8a9b94;font-style:italic}pre.code .n{color:#f78c6c}pre.code .f{color:#82aaff}
figure{margin:1.2em 0;text-align:center}
figure img{max-width:100%;height:auto;border-radius:12px;border:1px solid var(--r-line);background:#fff}
figure figcaption{font-size:.78em;color:var(--r-mute);margin-top:6px;line-height:1.5}
figure .zoom{font-size:.72em;color:var(--teal);font-weight:700}
.endcard{margin:2em 0 1em;text-align:center;border:2px dashed var(--r-line);border-radius:18px;padding:22px 16px}
.endcard .big{font-size:2.4rem}
.endcard h3{margin:.3em 0;font-size:1.2em}
.endcard .row{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:12px}
/* themes */
.t-sepia{--r-bg:#f6eedc;--r-ink:#3a2f22;--r-mute:#7a6a55;--r-line:#e5d8bd;--r-soft:#efe4cc}
.t-night{--r-bg:#0f1714;--r-ink:#d9e4df;--r-mute:#8ea39a;--r-line:#22312c;--r-soft:#17221e}
.t-night figure img{filter:brightness(.92)}
/* sheet */
.sheet{position:fixed;inset:0;z-index:80;background:rgba(0,0,0,.45);display:flex;align-items:flex-end;justify-content:center;animation:fd .2s}
.sheet .in{background:#fff;color:var(--ink);width:100%;max-width:560px;border-radius:22px 22px 0 0;padding:18px 18px calc(22px + env(safe-area-inset-bottom));max-height:88vh;overflow:auto;animation:up .25s}
.sheet h3{margin:0 0 12px}
.seg{display:flex;background:#eef1ef;border-radius:12px;padding:4px;gap:4px}
.seg button{flex:1;padding:9px 6px;border-radius:9px;font-weight:700;font-size:.88rem}
.seg button.on{background:#fff;box-shadow:0 1px 4px rgba(0,0,0,.12);color:var(--teal)}
.lbl{font-size:.8rem;font-weight:800;color:var(--mute);text-transform:uppercase;letter-spacing:.06em;margin:16px 0 8px}
input[type=range]{width:100%;accent-color:var(--teal)}
@keyframes up{from{transform:translateY(40px);opacity:0}}
@keyframes fd{from{opacity:0}}
/* quiz */
.qwrap{min-height:100vh;background:var(--bg)}
.qhead{background:var(--deep);color:#fff;padding:calc(12px + env(safe-area-inset-top)) 0 14px}
.qhead .wrap{display:flex;align-items:center;gap:10px}
.qhead .ttl{flex:1;font-weight:800;font-size:.95rem;line-height:1.3}
.timer{font-variant-numeric:tabular-nums;background:rgba(255,255,255,.12);border-radius:10px;padding:6px 10px;font-weight:900}
.timer.warn{background:var(--bad)}
.qcount{font-size:.8rem;color:var(--mute);font-weight:800;margin:16px 0 6px;letter-spacing:.04em}
.qtext{font-size:1.12rem;font-weight:700;line-height:1.55;margin:0 0 14px}
.qtext code,.opt code,.why code{font-family:ui-monospace,Menlo,Consolas,monospace;background:#eef1ef;border-radius:5px;padding:1px 5px;font-size:.9em}
.qtext pre{background:#0f1d1a;color:#e6efe9;border-radius:12px;padding:12px;font:13px/1.55 ui-monospace,Menlo,Consolas,monospace;overflow-x:auto;white-space:pre}
.opts{display:flex;flex-direction:column;gap:10px}
.opt{display:flex;gap:12px;align-items:flex-start;text-align:left;background:#fff;border:2px solid var(--line);border-radius:16px;padding:13px 14px;font-size:1rem;line-height:1.45;width:100%}
.opt .L{width:28px;height:28px;border-radius:9px;background:#eef1ef;display:flex;align-items:center;justify-content:center;font-weight:900;flex:none;font-size:.9rem}
.opt.sel{border-color:var(--teal);background:#eef8f6}.opt.sel .L{background:var(--teal);color:#fff}
.opt.right{border-color:var(--ok);background:var(--okbg)}.opt.right .L{background:var(--ok);color:#fff}
.opt.wrong{border-color:var(--bad);background:var(--badbg)}.opt.wrong .L{background:var(--bad);color:#fff}
.why{margin-top:12px;border-radius:14px;padding:12px 14px;font-size:.95rem;line-height:1.55}
.why.ok{background:var(--okbg);color:#14532d}.why.no{background:var(--badbg);color:#7a1d2a}
.qnav{display:flex;gap:10px;margin:18px 0 30px}
.qnav .btn{flex:1}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(40px,1fr));gap:6px;margin-top:10px}
.grid button{height:40px;border-radius:10px;background:#fff;border:1.5px solid var(--line);font-weight:800;font-size:.85rem}
.grid button.a{background:#dff1ed;border-color:var(--teal);color:var(--teal)}
.grid button.f{box-shadow:inset 0 -4px 0 var(--amber)}
.grid button.cur{outline:2.5px solid var(--deep);outline-offset:1px}
.score{text-align:center;padding:26px 10px}
.ring{width:150px;height:150px;margin:0 auto 10px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:2.2rem;font-weight:900;color:var(--deep);background:conic-gradient(var(--c) calc(var(--p)*1%),#e5ebe8 0)}
.ring span{width:118px;height:118px;border-radius:50%;background:var(--bg);display:flex;align-items:center;justify-content:center;flex-direction:column;line-height:1.1}
.ring small{font-size:.8rem;color:var(--mute);font-weight:700}
.rules li{margin:6px 0}
.warnbar{background:var(--badbg);color:var(--bad);font-weight:700;border-radius:12px;padding:10px 12px;margin-top:12px;font-size:.9rem}
/* gate */
.gate{min-height:100vh;display:flex;flex-direction:column;background:radial-gradient(120% 70% at 50% 0%,#14594f 0%,var(--deep) 55%,#04201c 100%);color:#fff;padding:calc(28px + env(safe-area-inset-top)) 18px 30px}
.gate .in{max-width:420px;width:100%;margin:0 auto}
.gate .logo{width:84px;height:84px;border-radius:20px;display:block;margin:6px auto 12px;box-shadow:0 10px 28px rgba(0,0,0,.4)}
.gate h1{text-align:center;font-size:1.55rem;margin:0}
.gate h1 span{color:var(--amber)}
.gate .sub{text-align:center;opacity:.85;font-size:.92rem;margin:4px 0 18px}
.gate .card{color:var(--ink)}
.gate label{display:block;font-weight:800;font-size:.9rem;color:var(--deep);margin:12px 0 4px}
.gate input{width:100%;font:inherit;font-size:1.05rem;padding:12px 14px;border:1.8px solid var(--line);border-radius:12px;background:#fff;color:var(--ink)}
.gate input:focus{outline:none;border-color:var(--amber)}
.err{background:var(--badbg);color:var(--bad);border-radius:10px;padding:9px 12px;font-size:.9rem;margin-top:12px;font-weight:700}
.note{font-size:.84rem;color:var(--mute);margin-top:12px;line-height:1.45}
.help{text-align:center;font-size:.86rem;opacity:.85;margin-top:16px;line-height:1.5}
.spin{width:36px;height:36px;border-radius:50%;border:4px solid rgba(255,255,255,.25);border-top-color:var(--amber);animation:sp 1s linear infinite;margin:40px auto 10px}
@keyframes sp{to{transform:rotate(360deg)}}
.inst{background:linear-gradient(135deg,#fff8e1,#fff);border:1.5px solid var(--amber);border-radius:14px;padding:12px 14px;margin:16px 0 0;display:flex;gap:12px;align-items:center;color:var(--ink)}
.inst img{width:46px;height:46px;border-radius:11px;flex:none}
.inst b{color:var(--deep);display:block;font-size:.98rem}
.inst small{color:var(--mute);font-size:.84rem;line-height:1.35;display:block}
.inst small b,.inst .iosbox b{display:inline;font-size:inherit}
.inst .btn{padding:8px 14px;margin-left:auto;flex:none}
.iosbox{margin-top:8px;font-size:.88rem;line-height:1.5}
/* modal + zoom */
.modal{position:fixed;inset:0;z-index:90;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;padding:20px}
.modal .in{background:#fff;color:var(--ink);border-radius:20px;padding:20px;max-width:420px;width:100%}
.modal h3{margin:0 0 8px}
.modal .row{display:flex;gap:10px;margin-top:16px}
.modal .row .btn{flex:1}
.zoomv{position:fixed;inset:0;z-index:95;background:#0b1210;display:flex;flex-direction:column}
.zoomv .bar2{display:flex;gap:8px;padding:calc(10px + env(safe-area-inset-top)) 12px 10px;color:#fff;align-items:center}
.zoomv .bar2 .sp{flex:1}
.zoomv .bar2 button{background:rgba(255,255,255,.12);color:#fff;border-radius:10px;width:42px;height:42px;font-size:1.2rem}
.zoomv .sc{flex:1;overflow:auto;-webkit-overflow-scrolling:touch;display:flex;align-items:flex-start}
.zoomv img{display:block;margin:auto;background:#fff}
.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom));transform:translateX(-50%);background:var(--deep);color:#fff;padding:10px 16px;border-radius:12px;font-weight:700;font-size:.9rem;z-index:99;box-shadow:0 8px 24px rgba(0,0,0,.3);animation:up .25s;max-width:90vw;text-align:center}
.confetti{position:fixed;inset:0;pointer-events:none;z-index:98}
.foot{text-align:center;color:var(--mute);font-size:.8rem;margin:30px 0 40px}
/* ---- premium ---- */
.pill.gold{background:linear-gradient(135deg,#f7d27a,#f0a93a);color:#3b2400}
.shine{position:relative;overflow:hidden}
.shine::after{content:"";position:absolute;top:0;left:-60%;width:40%;height:100%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.55),transparent);transform:skewX(-20deg);animation:shine 3.2s ease-in-out infinite}
@keyframes shine{0%,55%{left:-60%}100%{left:130%}}
.promo{display:flex;align-items:center;gap:12px;width:100%;margin-top:16px;padding:14px 16px;border-radius:18px;background:linear-gradient(120deg,#2a1a00,#5a3a05 45%,#8a5b0a);color:#fff;border:1.5px solid #f0c45a;box-shadow:0 10px 26px rgba(138,91,10,.35)}
.promo .pi{font-size:1.9rem;filter:drop-shadow(0 2px 6px rgba(240,169,58,.6))}
.promo b{display:block;font-size:1.05rem;color:#ffd77a}
.promo small{opacity:.9;font-size:.82rem}
.promo .pg{background:linear-gradient(135deg,#ffd77a,#f0a93a);color:#3b2400;font-weight:900;border-radius:12px;padding:8px 12px;font-size:.85rem;white-space:nowrap}
.book.locked .cv{filter:saturate(.85)}
.ribbon{position:absolute;top:12px;right:-34px;transform:rotate(35deg);background:linear-gradient(135deg,#ffd77a,#f0a93a);color:#3b2400;font-weight:900;font-size:.68rem;letter-spacing:.06em;padding:5px 40px;box-shadow:0 4px 12px rgba(0,0,0,.3)}
.book.locked .bd{background:linear-gradient(180deg,#fffaf0,#fff)}
.ch.lockd{background:#fbf8f1;border-style:dashed}
.ch.lockd .no{background:#f3ead6;color:#9a7a3a}
.ch.lockd .go{font-size:1rem}
.pwall{position:relative;margin-top:-140px;padding-top:140px}
.pwall .fade{position:absolute;left:0;right:0;top:0;height:160px;background:linear-gradient(180deg,rgba(255,255,255,0),var(--r-bg) 85%)}
.pcard{position:relative;text-align:center;border-radius:22px;padding:22px 18px;background:linear-gradient(160deg,#fffaf0,#fff);border:2px solid #f0c45a;box-shadow:0 14px 34px rgba(138,91,10,.18);color:#1c2622;font-size:16px;line-height:1.5}
.pcard .crown,.prem .crown{font-size:2.6rem;filter:drop-shadow(0 4px 10px rgba(240,169,58,.5))}
.pcard h3{margin:.2em 0 .3em;font-size:1.3rem}
.prem{text-align:center;background:linear-gradient(180deg,#fffaf0,#fff 40%)!important}
.prem h3{font-size:1.5rem;margin:.2em 0}.prem h3 span{background:linear-gradient(135deg,#c77900,#f0a93a);-webkit-background-clip:text;background-clip:text;color:transparent}
.prem .why2{color:var(--mute);margin:.2em 0 .6em}
.perks{list-style:none;padding:0;margin:12px 0;text-align:left;display:flex;flex-direction:column;gap:9px}
.perks li{background:#fff;border:1px solid #f1e3c2;border-radius:12px;padding:10px 12px;font-size:.93rem;line-height:1.4}
.price{font-size:1.4rem;font-weight:900;color:#8a5500;margin:6px 0 12px}
/* ---- written answers ---- */
.ta{width:100%;font:inherit;font-size:1rem;line-height:1.6;padding:14px;border:2px solid var(--line);border-radius:16px;background:#fff;color:var(--ink);resize:vertical;min-height:150px}
.ta:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 4px rgba(14,110,102,.12)}
.ta[readonly]{background:#f7f9f8}
.wc{display:flex;justify-content:space-between;font-size:.78rem;color:var(--mute);margin:6px 2px 0;gap:10px}
.model{margin-top:14px;border-radius:16px;background:var(--okbg);border:1.5px solid #bfe3cc;padding:14px}
.model .mb{white-space:normal;line-height:1.6;color:#14532d}
.mt{font-weight:900;font-size:.82rem;letter-spacing:.04em;margin-bottom:8px;color:var(--deep)}
.kp{margin-top:12px;border-radius:16px;background:#fff;border:1.5px solid var(--line);padding:14px}
.kpi{display:flex;gap:10px;align-items:flex-start;padding:10px;border-radius:12px;margin:6px 0;background:#f6f8f7;cursor:pointer;line-height:1.45}
.kpi input{width:20px;height:20px;margin-top:2px;accent-color:var(--ok);flex:none}
.kpi.on{background:var(--okbg)}
.kpi em{display:inline-block;font-style:normal;font-size:.72rem;font-weight:800;color:var(--ok);background:#fff;border-radius:999px;padding:1px 8px;margin-left:4px}
.kps{margin-top:10px;font-size:.95rem;text-align:center}
.wbar{background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px 14px;text-align:left;max-width:420px;margin:14px auto 0}
.wbar div:first-child{display:flex;justify-content:space-between;gap:10px;font-size:.9rem}
.wbar span{color:var(--mute)}
.opt.pop{animation:pop .35s}
.opt.shake{animation:shake .35s}
@keyframes pop{50%{transform:scale(1.03)}}
@keyframes shake{25%{transform:translateX(-6px)}75%{transform:translateX(6px)}}
.hero .wrap{position:relative;z-index:1}
.book{transition:transform .15s}.book:active{transform:scale(.97)}
.ch{transition:transform .12s}.ch:active{transform:scale(.99)}
.rbody pre.code code{background:none;border:0;padding:0;border-radius:0;white-space:pre;font-size:inherit;color:inherit;display:block}
a.btn{text-decoration:none}
/* bottom navigation */
.bnav{position:fixed;left:0;right:0;bottom:0;z-index:40;display:flex;justify-content:space-around;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-top:1px solid var(--line);padding:6px 6px calc(6px + env(safe-area-inset-bottom));box-shadow:0 -6px 20px rgba(0,0,0,.06)}
.bnav a{flex:1;display:flex;flex-direction:column;align-items:center;gap:1px;text-decoration:none;color:var(--mute);font-size:.72rem;font-weight:800;padding:4px 0;border-radius:12px}
.bnav a span{font-size:1.35rem;line-height:1.2;filter:grayscale(.6)}
.bnav a.on{color:var(--teal);background:#e8f4f1}.bnav a.on span{filter:none}
.bnav a.gold{color:#8a5500}.bnav a.gold span{filter:none;animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{50%{transform:scale(1.15)}}
.wrap>.foot:last-child,.foot{margin-bottom:96px}
.avatar{width:54px;height:54px;border-radius:16px;background:linear-gradient(135deg,var(--teal),var(--deep));color:#fff;font-weight:900;font-size:1.5rem;display:flex;align-items:center;justify-content:center}
.planbox{margin:16px 0 12px;border-radius:14px;padding:12px 14px;background:#eef6f4;font-size:.95rem}
.planbox.p{background:linear-gradient(135deg,#fff3d6,#fde3a7)}